磁场对铁在氯化钠溶液中阳极溶解速率的影响
Effect of Magnetic Field on Anodic Dissolution Rate of Iron in Sodium Chloride Solution
摘 要
采用动电位极化和恒电位极化等方法,研究了磁场对铁在0.2 mol/L氯化钠溶液中阳极溶解速率的影响。结果表明:磁场加速了铁的阳极溶解速率;在0 T磁场下动电位极化后,铁电极表面宏观均匀;在0.4 T磁场下动电位极化后,铁电极表面与磁场方向平行的两侧出现局部加速溶解;恒电位极化时,外加磁场下铁-电极溶液界面达到稳态所需的时间比无外加磁场下所需的长;在0 T和0.4 T磁场下恒电位极化时,在较宽的电位范围内磁场对阳极电流的增强系数相近。
铁
阳极溶解
氯化钠
腐蚀
magnetic field
iron
anodic dissolution
sodium chloride
corrosion
Abstract
The effect of magenetic field on anodic dissolution rate of iron in 0.2 mol/L sodium chloride solution was investigated by potentiodynamic polarization and potentiostatic polarization. The results showed that magnetic field accelerated the anodic dissolution rate of iron. The surface of electrode was macrsocopically uniform after potentiodynamic polarization in 0 T magnetic field. After potentiodynamic polarization in 0.4 T magnetic field, locally accelerated dissolution occurred on both sides of the iron electrode surface parallel to the direction of magnetic field. It took longer time for iron-electrode solution interface to reach the steady state in an applied magnetic field than that during anodic polarization in no applied magnetic field during potentiodynamic polarization. When potentiostatic polarization in 0 T and 0.4 T magnetic fields, the enhancement factor for anodic current density by the magnetic field was similar in a wide potential range.
中图分类号 TG172 DOI 10.11973/fsyfh-202206011
所属栏目 试验研究
基金项目 国家自然科学基金项目(51571183);国家重点研发计划(2017YFB0703002)
收稿日期 2020/3/3
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引用该论文: LI Chen,XU Xinhe,SONG Xiaojuan,NING Fei,DONG Haiying,CAI Shuangwei,TANG Yuanjie,LV Zhanpeng. Effect of Magnetic Field on Anodic Dissolution Rate of Iron in Sodium Chloride Solution[J]. Corrosion & Protection, 2022, 43(6): 58
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参考文献
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【14】LU Z P,YANG W. In situ monitoring the effects of a magnetic field on the open-circuit corrosion states of iron in acidic and neutral solutions[J]. Corrosion Science,2008,50(2):510-522.
【2】TACKEN R A,JANSSEN L J J. Applications of magnetoelectrolysis[J]. Journal of Applied Electrochemistry,1995,25(1):1-5.
【3】MONZON L M A,COEY J M D. Magnetic fields in electrochemistry:the Lorentz force.A mini-review[J]. Electrochemistry Communications,2014,42:38-41.
【4】MONZON L M A,COEY J M D. Magnetic fields in electrochemistry:the Kelvin force.A mini-review[J]. Electrochemistry Communications,2014,42:42-45.
【5】LU Z P,HUANG D L,YANG W,et al. Effects of an applied magnetic field on the dissolution and passivation of iron in sulphuric acid[J]. Corrosion Science,2003,45(10):2233-2249.
【6】LU Z P,HUANG D L,YANG W. Probing into the effects of a magnetic field on the electrode processes of iron in sulphuric acid solutions with dichromate based on the fundamental electrochemistry kinetics[J]. Corrosion Science,2005,47(6):1471-1492.
【7】LU Z P,HUANG C B,HUANG D L,et al. Effects of a magnetic field on the anodic dissolution,passivation and transpassivation behaviour of iron in weakly alkaline solutions with or without halides[J]. Corrosion Science,2006,48(10):3049-3077.
【8】LU Z P,SHOJI T,YANG W. Anomalous surface morphology of iron generated after anodic dissolution under magnetic fields[J]. Corrosion Science,2010,52(8):2680-2686.
【9】LI H J,XIONG Q,LU Z P,et al. A magnetic field induced undulated surface and the shift of the active/passivation transition threshold of iron in a sulfuric acid solution[J]. Corrosion Science,2017,129:179-191.
【10】LU Z P,CHEN J M. Magnetic field effects on anodic polarisation behaviour of iron in neutral aqueous solutions[J]. British Corrosion Journal,2000,35(3):224-228.
【11】LI H J,NING F,DONG H Y,et al. Effects of magnetic field on uneven dissolution of iron in sulfuric acid solution with chlorides[J]. Corrosion,2020,76(6):528-538.
【12】WANG C,CHEN S H,YU X L. Anodic dissolution of iron in a magnetic field with holographic microphotography[J]. Journal of the Electrochemical Society,1996,143(12):L283-L285.
【13】SUEPTITZ R,KOZA J,UHLEMANN M,et al. Magnetic field effect on the anodic behaviour of a ferromagnetic electrode in acidic solutions[J]. Electrochimica Acta,2009,54(8):2229-2233.
【14】LU Z P,YANG W. In situ monitoring the effects of a magnetic field on the open-circuit corrosion states of iron in acidic and neutral solutions[J]. Corrosion Science,2008,50(2):510-522.
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